NuAngel Flip & Go Nursing Pad Case with All-Natural Washable Nursing Pad Set combines the convenience of 4 blue cotton pads in a matching flip and go cotton case and the reliability of 8 washable natural cotton pads. The flip and go case features two inside pockets to store clean and used pads and consists of a waterproof nylon taffeta lining. The pads are made from 100% cotton for maximum air circulation as recommended by breastfeeding experts. Pads made from cotton are more comfortable, absorbent, and less irritating. NuAngel pads are made from plush soft layers of quality U.S.A. made cotton flannel. The pads are approximately 4.5" in diameter to accommodate various bra sizes. They naturally conform to individual shapes for a comfortable fit with fewer leaks.